feat: WebSocket real-time + rAF render gate + guest board + screen picker
Classroom performance: - WebSocket server (ws-server.js) for low-latency cursor & stroke preview Replaces HTTP POST per event → eliminates per-message auth overhead Session member cache (30s TTL) avoids SQLite query per WS message Fallback to HTTP POST when WS not connected - Cursor throttle reduced 100ms → 33ms (~30fps) - Stroke preview throttle reduced 50ms → 20ms - whiteboard.js: render() is now rAF-gated (_doRender/_rafPending) Multiple render() calls within one frame collapse into one repaint document.hidden check — zero CPU when tab is in background visibilitychange listener restores canvas on tab focus Guest board: - guestClassroom.js route: public token-based read-only access - guest-board.html: name entry + read-only whiteboard + SSE - SSE: addGuestClient/removeGuestClient/emitToGuests Screen share picker: - Discord-style modal with tab switching (screen/window/tab) - Live video preview before confirming share - useExistingScreenStream() in ClassroomRTC Fullscreen exit overlay: - #cr-fs-exit-overlay button inside cr-board-wrap - Visible only via CSS :fullscreen selector (touchpad users) File sharing from library: - Teacher picks file from library, sends as styled card in chat - crDownloadLibraryFile() fetches with Bearer auth Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Maxim Dolgolyov
Generated
+23
-1
@@ -15,7 +15,8 @@
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"express": "^4.18.3",
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"jsonwebtoken": "^9.0.2",
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"multer": "^2.1.1",
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"sharp": "^0.34.5"
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"sharp": "^0.34.5",
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"ws": "^8.20.0"
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},
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"devDependencies": {
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"nodemon": "^3.1.0"
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@@ -2038,6 +2039,27 @@
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"engines": {
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"node": ">= 0.8"
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}
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},
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"node_modules/ws": {
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"version": "8.20.0",
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"resolved": "https://registry.npmjs.org/ws/-/ws-8.20.0.tgz",
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"integrity": "sha512-sAt8BhgNbzCtgGbt2OxmpuryO63ZoDk/sqaB/znQm94T4fCEsy/yV+7CdC1kJhOU9lboAEU7R3kquuycDoibVA==",
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"license": "MIT",
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"engines": {
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"node": ">=10.0.0"
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},
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"peerDependencies": {
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"bufferutil": "^4.0.1",
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"utf-8-validate": ">=5.0.2"
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},
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"peerDependenciesMeta": {
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"bufferutil": {
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"optional": true
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},
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"utf-8-validate": {
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"optional": true
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}
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}
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}
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}
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}
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@@ -12,13 +12,14 @@
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},
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"dependencies": {
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"bcryptjs": "^2.4.3",
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"compression": "^1.8.1",
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"compression": "^1.8.1",
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"cors": "^2.8.5",
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"dotenv": "^16.4.5",
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"express": "^4.18.3",
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"jsonwebtoken": "^9.0.2",
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"multer": "^2.1.1",
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"sharp": "^0.34.5"
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"sharp": "^0.34.5",
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"ws": "^8.20.0"
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},
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"devDependencies": {
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"nodemon": "^3.1.0"
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@@ -324,7 +324,7 @@ function getFeatures(_req, res) {
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/* ── PATCH /api/admin/features ──────────────────────────────────────── */
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function updateFeatures(req, res) {
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const allowed = ['crossword', 'hangman', 'pet', 'red_book', 'collection',
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'flashcards', 'knowledge_map', 'board', 'biochem', 'live_quiz'];
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'flashcards', 'knowledge_map', 'board', 'biochem', 'live_quiz', 'classroom'];
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const updates = req.body;
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const stmt = db.prepare("INSERT OR REPLACE INTO app_settings (key, value) VALUES (?, ?)");
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const changed = [];
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@@ -1,7 +1,8 @@
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const db = require('../db/db');
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const path = require('path');
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const fs = require('fs');
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const { emit, emitToClass, getOnlineUserIds } = require('../sse');
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const crypto = require('crypto');
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const { emit, emitToClass, getOnlineUserIds, emitToGuests } = require('../sse');
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/* ── chat attachment uploads dir ─────────────────────────────────────── */
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const CHAT_UPLOADS_DIR = path.join(__dirname, '../../uploads/chat');
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@@ -15,6 +16,14 @@ function canDraw(sessionId, userId, session) {
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).get(sessionId, userId);
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}
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/* Events forwarded to read-only guest viewers (whiteboard + lifecycle only) */
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const GUEST_EVENTS = new Set([
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'classroom_strokes', 'classroom_stroke_preview', 'classroom_stroke_deleted',
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'classroom_stroke_updated', 'classroom_page_added', 'classroom_page_changed',
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'classroom_template_changed', 'classroom_page_cleared', 'classroom_page_renamed',
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'classroom_page_duplicated', 'classroom_page_deleted', 'classroom_ended',
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]);
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/* ── Helper: broadcast to all session participants ─────────────────────── */
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function emitToSession(sessionId, data) {
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const session = db.prepare('SELECT class_id, teacher_id FROM classroom_sessions WHERE id=?').get(sessionId);
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@@ -29,6 +38,9 @@ function emitToSession(sessionId, data) {
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const invites = db.prepare('SELECT user_id FROM classroom_invites WHERE session_id=?').all(sessionId);
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for (const { user_id } of invites) emit(user_id, data);
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}
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// Forward whitelisted events to guest viewers
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if (GUEST_EVENTS.has(data.type)) emitToGuests(sessionId, data);
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}
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/* ── Helper: check if user has access to session ──────────────────────── */
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@@ -50,6 +62,12 @@ function createSession(req, res) {
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const { class_id, user_ids, title = '' } = req.body;
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const teacher = req.user;
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// Check if classroom module is enabled
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const classroomEnabled = db.prepare("SELECT value FROM app_settings WHERE key='feature_classroom_enabled'").get();
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if (classroomEnabled?.value === '0') {
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return res.status(403).json({ error: 'Модуль онлайн-уроков отключён администратором' });
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}
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if (!class_id && (!user_ids || !user_ids.length)) {
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return res.status(400).json({ error: 'Укажите class_id или user_ids' });
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}
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@@ -585,10 +603,11 @@ function getStrokes(req, res) {
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const strokes = rows.map(r => ({ ...r, data: JSON.parse(r.data) }));
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const pageRow = db.prepare('SELECT template FROM classroom_pages WHERE session_id=? AND page_num=?').get(sessionId, pageNum);
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const pageRow = db.prepare('SELECT template, name FROM classroom_pages WHERE session_id=? AND page_num=?').get(sessionId, pageNum);
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const template = pageRow?.template || 'blank';
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const name = pageRow?.name || null;
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res.json({ strokes, template });
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res.json({ strokes, template, name });
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}
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/* PATCH /api/classroom/:id/strokes/:strokeId — update image position/size */
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@@ -656,6 +675,103 @@ function clearPage(req, res) {
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res.json({ ok: true });
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}
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/* GET /api/classroom/:id/pages — list all pages with names/templates */
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function getPages(req, res) {
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const sessionId = Number(req.params.id);
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const session = db.prepare('SELECT * FROM classroom_sessions WHERE id=?').get(sessionId);
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if (!session) return res.status(404).json({ error: 'Не найдено' });
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if (!hasAccess(session, req.user.id, req.user.role))
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return res.status(403).json({ error: 'Нет доступа' });
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const maxS = db.prepare('SELECT COALESCE(MAX(page_num),0) AS m FROM classroom_strokes WHERE session_id=?').get(sessionId).m;
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const maxP = db.prepare('SELECT COALESCE(MAX(page_num),0) AS m FROM classroom_pages WHERE session_id=?').get(sessionId).m;
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const total = Math.max(session.current_page, maxS, maxP, 1);
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const rows = db.prepare('SELECT page_num, template, name FROM classroom_pages WHERE session_id=?').all(sessionId);
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const map = {};
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rows.forEach(r => { map[r.page_num] = r; });
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const pages = [];
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for (let i = 1; i <= total; i++) {
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pages.push({ page_num: i, template: map[i]?.template || 'blank', name: map[i]?.name || null });
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}
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res.json({ pages, currentPage: session.current_page });
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}
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/* PATCH /api/classroom/:id/pages/:pageNum/name — rename page */
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function renamePage(req, res) {
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const sessionId = Number(req.params.id);
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const pageNum = Number(req.params.pageNum);
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const { name } = req.body;
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const session = db.prepare(`SELECT * FROM classroom_sessions WHERE id=? AND status='active'`).get(sessionId);
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if (!session) return res.status(404).json({ error: 'Сессия не активна' });
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if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
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return res.status(403).json({ error: 'Нет доступа' });
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db.prepare('INSERT OR IGNORE INTO classroom_pages (session_id, page_num, template) VALUES (?,?,?)').run(sessionId, pageNum, 'blank');
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db.prepare('UPDATE classroom_pages SET name=? WHERE session_id=? AND page_num=?').run(name || null, sessionId, pageNum);
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emitToSession(sessionId, { type: 'classroom_page_renamed', sessionId, pageNum, name: name || null });
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res.json({ ok: true, pageNum, name: name || null });
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}
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/* POST /api/classroom/:id/pages/:pageNum/duplicate — duplicate a page */
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function duplicatePage(req, res) {
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const sessionId = Number(req.params.id);
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const srcPage = Number(req.params.pageNum);
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const session = db.prepare(`SELECT * FROM classroom_sessions WHERE id=? AND status='active'`).get(sessionId);
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if (!session) return res.status(404).json({ error: 'Сессия не активна' });
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if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
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return res.status(403).json({ error: 'Нет доступа' });
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const srcRow = db.prepare('SELECT template, name FROM classroom_pages WHERE session_id=? AND page_num=?').get(sessionId, srcPage);
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const srcTpl = srcRow?.template || 'blank';
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const newName = srcRow?.name ? srcRow.name + ' (копия)' : null;
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const maxS = db.prepare('SELECT COALESCE(MAX(page_num),0) AS m FROM classroom_strokes WHERE session_id=?').get(sessionId).m;
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const maxP = db.prepare('SELECT COALESCE(MAX(page_num),0) AS m FROM classroom_pages WHERE session_id=?').get(sessionId).m;
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const newPage = Math.max(session.current_page, maxS, maxP) + 1;
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db.prepare('INSERT OR IGNORE INTO classroom_pages (session_id, page_num, template, name) VALUES (?,?,?,?)').run(sessionId, newPage, srcTpl, newName);
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const strokes = db.prepare('SELECT tool, data FROM classroom_strokes WHERE session_id=? AND page_num=? ORDER BY seq').all(sessionId, srcPage);
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const ins = db.prepare('INSERT INTO classroom_strokes (session_id, page_num, tool, data) VALUES (?,?,?,?)');
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db.transaction(() => { strokes.forEach(s => ins.run(sessionId, newPage, s.tool, s.data)); })();
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db.prepare('UPDATE classroom_sessions SET current_page=? WHERE id=?').run(newPage, sessionId);
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emitToSession(sessionId, { type: 'classroom_page_duplicated', sessionId, srcPage, newPage, template: srcTpl, name: newName });
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res.json({ ok: true, newPage, template: srcTpl, name: newName });
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}
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/* DELETE /api/classroom/:id/pages/:pageNum — delete a page */
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function deletePage(req, res) {
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const sessionId = Number(req.params.id);
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const pageNum = Number(req.params.pageNum);
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const session = db.prepare(`SELECT * FROM classroom_sessions WHERE id=? AND status='active'`).get(sessionId);
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if (!session) return res.status(404).json({ error: 'Сессия не активна' });
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if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
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return res.status(403).json({ error: 'Нет доступа' });
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const maxS = db.prepare('SELECT COALESCE(MAX(page_num),0) AS m FROM classroom_strokes WHERE session_id=?').get(sessionId).m;
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const maxP = db.prepare('SELECT COALESCE(MAX(page_num),0) AS m FROM classroom_pages WHERE session_id=?').get(sessionId).m;
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const total = Math.max(session.current_page, maxS, maxP, 1);
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if (total <= 1) return res.status(400).json({ error: 'Нельзя удалить единственную страницу' });
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db.prepare('DELETE FROM classroom_strokes WHERE session_id=? AND page_num=?').run(sessionId, pageNum);
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db.prepare('DELETE FROM classroom_pages WHERE session_id=? AND page_num=?').run(sessionId, pageNum);
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db.prepare('UPDATE classroom_strokes SET page_num=page_num-1 WHERE session_id=? AND page_num>?').run(sessionId, pageNum);
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db.prepare('UPDATE classroom_pages SET page_num=page_num-1 WHERE session_id=? AND page_num>?').run(sessionId, pageNum);
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let newCurrent = session.current_page;
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if (newCurrent > pageNum) newCurrent--;
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else if (newCurrent === pageNum) newCurrent = Math.max(1, pageNum - 1);
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db.prepare('UPDATE classroom_sessions SET current_page=? WHERE id=?').run(newCurrent, sessionId);
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emitToSession(sessionId, { type: 'classroom_page_deleted', sessionId, pageNum, newCurrent });
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res.json({ ok: true, pageNum, newCurrent });
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}
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/* POST /api/classroom/:id/mute — teacher mutes a student */
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function mutePeer(req, res) {
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const sessionId = Number(req.params.id);
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@@ -797,6 +913,66 @@ function screenStop(req, res) {
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res.json({ ok: true });
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}
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/* ── Simulation integration ──────────────────────────────────────────────── */
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/* POST /api/classroom/:id/sim — teacher opens simulation for everyone */
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function simOpen(req, res) {
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const sessionId = Number(req.params.id);
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const session = db.prepare(`SELECT * FROM classroom_sessions WHERE id=? AND status='active'`).get(sessionId);
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if (!session) return res.status(404).json({ error: 'Сессия не активна' });
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if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
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return res.status(403).json({ error: 'Нет доступа' });
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const { simId, title } = req.body;
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if (!simId || typeof simId !== 'string' || !/^[a-z0-9_-]{1,40}$/.test(simId))
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return res.status(400).json({ error: 'Неверный simId' });
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emitToSession(sessionId, { type: 'classroom_sim_open', sessionId, simId, title: (title || simId).slice(0, 80) });
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res.json({ ok: true });
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}
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/* POST /api/classroom/:id/sim/state — teacher relays sim state to students */
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function simState(req, res) {
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const sessionId = Number(req.params.id);
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const session = db.prepare(`SELECT * FROM classroom_sessions WHERE id=? AND status='active'`).get(sessionId);
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if (!session) return res.status(404).json({ error: 'Сессия не активна' });
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if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
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return res.status(403).json({ error: 'Нет доступа' });
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const { state } = req.body;
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if (!state || typeof state !== 'object') return res.status(400).json({ error: 'Нет state' });
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emitToSession(sessionId, { type: 'classroom_sim_state', sessionId, state });
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res.json({ ok: true });
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}
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/* POST /api/classroom/:id/sim/mode — teacher sets sim mode (demo/free) */
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function simMode(req, res) {
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const sessionId = Number(req.params.id);
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const session = db.prepare(`SELECT * FROM classroom_sessions WHERE id=? AND status='active'`).get(sessionId);
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if (!session) return res.status(404).json({ error: 'Сессия не активна' });
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if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
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return res.status(403).json({ error: 'Нет доступа' });
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const { mode } = req.body;
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if (mode !== 'demo' && mode !== 'free') return res.status(400).json({ error: 'mode must be demo|free' });
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emitToSession(sessionId, { type: 'classroom_sim_mode', sessionId, mode });
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res.json({ ok: true });
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}
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/* DELETE /api/classroom/:id/sim — teacher closes simulation */
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function simClose(req, res) {
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const sessionId = Number(req.params.id);
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const session = db.prepare(`SELECT * FROM classroom_sessions WHERE id=? AND status='active'`).get(sessionId);
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if (!session) return res.status(404).json({ error: 'Сессия не активна' });
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if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
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return res.status(403).json({ error: 'Нет доступа' });
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emitToSession(sessionId, { type: 'classroom_sim_close', sessionId });
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res.json({ ok: true });
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}
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/* ── Chat: upload image attachment ──────────────────────────────────────── */
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function uploadChatAttachment(req, res) {
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if (!req.file) return res.status(400).json({ error: 'Файл не получен' });
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@@ -870,7 +1046,341 @@ function saveNotes(req, res) {
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res.json({ ok: true });
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}
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/* ── Lesson history ─────────────────────────────────────────────────────── */
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/* GET /api/classroom/class/:classId/history */
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function getClassHistory(req, res) {
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const classId = Number(req.params.classId);
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const page = Math.max(1, Number(req.query.page) || 1);
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const limit = Math.min(50, Number(req.query.limit) || 20);
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const search = (req.query.search || '').trim();
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const offset = (page - 1) * limit;
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// Access check: admin sees all; teacher must own the class; student must be member
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const cls = db.prepare('SELECT * FROM classes WHERE id=?').get(classId);
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if (!cls) return res.status(404).json({ error: 'Класс не найден' });
|
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if (req.user.role === 'teacher') {
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if (cls.teacher_id !== req.user.id) return res.status(403).json({ error: 'Нет доступа' });
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} else if (req.user.role === 'student' || req.user.role === 'free_student') {
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const member = db.prepare('SELECT 1 FROM class_members WHERE class_id=? AND user_id=?').get(classId, req.user.id);
|
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if (!member) return res.status(403).json({ error: 'Нет доступа' });
|
||||
}
|
||||
|
||||
const whereSearch = search ? `AND (s.title LIKE '%'||?||'%')` : '';
|
||||
const params = search ? [classId, search] : [classId];
|
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const total = db.prepare(`
|
||||
SELECT COUNT(*) AS n FROM classroom_sessions s
|
||||
WHERE s.class_id=? AND s.status='ended' ${whereSearch}
|
||||
`).get(...params).n;
|
||||
|
||||
const sessions = db.prepare(`
|
||||
SELECT s.id, s.title, s.created_at, s.ended_at, s.teacher_id,
|
||||
u.name AS teacher_name,
|
||||
(SELECT COUNT(*) FROM classroom_attendance WHERE session_id=s.id) AS participant_count,
|
||||
(SELECT COUNT(*) FROM classroom_chat WHERE session_id=s.id) AS message_count,
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(COALESCE((SELECT MAX(page_num) FROM classroom_pages WHERE session_id=s.id),1)) AS page_count,
|
||||
(SELECT COUNT(*) FROM classroom_strokes WHERE session_id=s.id) AS stroke_count
|
||||
FROM classroom_sessions s
|
||||
JOIN users u ON u.id = s.teacher_id
|
||||
WHERE s.class_id=? AND s.status='ended' ${whereSearch}
|
||||
ORDER BY s.ended_at DESC
|
||||
LIMIT ? OFFSET ?
|
||||
`).all(...params, limit, offset);
|
||||
|
||||
res.json({ sessions, total, page, pages: Math.ceil(total / limit) });
|
||||
}
|
||||
|
||||
/* GET /api/classroom/my/history */
|
||||
function getMyHistory(req, res) {
|
||||
const page = Math.max(1, Number(req.query.page) || 1);
|
||||
const limit = Math.min(50, Number(req.query.limit) || 20);
|
||||
const offset = (page - 1) * limit;
|
||||
|
||||
let sessions, total;
|
||||
if (req.user.role === 'teacher' || req.user.role === 'admin') {
|
||||
total = db.prepare(`SELECT COUNT(*) AS n FROM classroom_sessions WHERE teacher_id=? AND status='ended'`).get(req.user.id).n;
|
||||
sessions = db.prepare(`
|
||||
SELECT s.id, s.title, s.created_at, s.ended_at, s.class_id, s.teacher_id,
|
||||
u.name AS teacher_name,
|
||||
c.name AS class_name,
|
||||
(SELECT COUNT(*) FROM classroom_attendance WHERE session_id=s.id) AS participant_count,
|
||||
(SELECT COUNT(*) FROM classroom_chat WHERE session_id=s.id) AS message_count,
|
||||
(COALESCE((SELECT MAX(page_num) FROM classroom_pages WHERE session_id=s.id),1)) AS page_count
|
||||
FROM classroom_sessions s
|
||||
JOIN users u ON u.id = s.teacher_id
|
||||
LEFT JOIN classes c ON c.id = s.class_id
|
||||
WHERE s.teacher_id=? AND s.status='ended'
|
||||
ORDER BY s.ended_at DESC LIMIT ? OFFSET ?
|
||||
`).all(req.user.id, limit, offset);
|
||||
} else {
|
||||
// student: sessions they have attendance records for
|
||||
total = db.prepare(`
|
||||
SELECT COUNT(DISTINCT s.id) AS n FROM classroom_sessions s
|
||||
JOIN classroom_attendance a ON a.session_id=s.id
|
||||
WHERE a.user_id=? AND s.status='ended'
|
||||
`).get(req.user.id).n;
|
||||
sessions = db.prepare(`
|
||||
SELECT s.id, s.title, s.created_at, s.ended_at, s.class_id,
|
||||
u.name AS teacher_name,
|
||||
c.name AS class_name,
|
||||
(SELECT COUNT(*) FROM classroom_attendance WHERE session_id=s.id) AS participant_count,
|
||||
(SELECT COUNT(*) FROM classroom_chat WHERE session_id=s.id) AS message_count,
|
||||
(COALESCE((SELECT MAX(page_num) FROM classroom_pages WHERE session_id=s.id),1)) AS page_count
|
||||
FROM classroom_sessions s
|
||||
JOIN users u ON u.id = s.teacher_id
|
||||
LEFT JOIN classes c ON c.id = s.class_id
|
||||
JOIN classroom_attendance a ON a.session_id=s.id
|
||||
WHERE a.user_id=? AND s.status='ended'
|
||||
GROUP BY s.id ORDER BY s.ended_at DESC LIMIT ? OFFSET ?
|
||||
`).all(req.user.id, limit, offset);
|
||||
}
|
||||
|
||||
res.json({ sessions, total, page, pages: Math.ceil(total / limit) });
|
||||
}
|
||||
|
||||
/* GET /api/classroom/:id/summary */
|
||||
function getSessionSummary(req, res) {
|
||||
const sessionId = Number(req.params.id);
|
||||
const session = db.prepare('SELECT * FROM classroom_sessions WHERE id=?').get(sessionId);
|
||||
if (!session) return res.status(404).json({ error: 'Не найдено' });
|
||||
if (!hasAccess(session, req.user.id, req.user.role))
|
||||
return res.status(403).json({ error: 'Нет доступа' });
|
||||
|
||||
const teacherName = db.prepare('SELECT name FROM users WHERE id=?').get(session.teacher_id)?.name || '';
|
||||
const className = session.class_id
|
||||
? db.prepare('SELECT name FROM classes WHERE id=?').get(session.class_id)?.name || null
|
||||
: null;
|
||||
|
||||
const durationSec = session.ended_at
|
||||
? Math.round((new Date(session.ended_at) - new Date(session.created_at)) / 1000)
|
||||
: null;
|
||||
|
||||
const stats = {
|
||||
duration_sec: durationSec,
|
||||
participant_count: db.prepare('SELECT COUNT(*) AS n FROM classroom_attendance WHERE session_id=?').get(sessionId).n,
|
||||
message_count: db.prepare('SELECT COUNT(*) AS n FROM classroom_chat WHERE session_id=?').get(sessionId).n,
|
||||
page_count: db.prepare('SELECT COALESCE(MAX(page_num),1) AS n FROM classroom_pages WHERE session_id=?').get(sessionId).n,
|
||||
stroke_count: db.prepare('SELECT COUNT(*) AS n FROM classroom_strokes WHERE session_id=?').get(sessionId).n,
|
||||
};
|
||||
|
||||
const attendance = db.prepare(`
|
||||
SELECT a.user_id, u.name AS user_name, a.joined_at, a.left_at
|
||||
FROM classroom_attendance a
|
||||
JOIN users u ON u.id = a.user_id
|
||||
WHERE a.session_id=? ORDER BY a.joined_at
|
||||
`).all(sessionId).map(r => ({
|
||||
...r,
|
||||
duration_sec: (r.joined_at && r.left_at)
|
||||
? Math.round((new Date(r.left_at) - new Date(r.joined_at)) / 1000)
|
||||
: null,
|
||||
}));
|
||||
|
||||
const pages = db.prepare(`
|
||||
SELECT p.page_num, p.template, p.name,
|
||||
(SELECT COUNT(*) FROM classroom_strokes WHERE session_id=p.session_id AND page_num=p.page_num) AS stroke_count
|
||||
FROM classroom_pages p
|
||||
WHERE p.session_id=? ORDER BY p.page_num
|
||||
`).all(sessionId);
|
||||
|
||||
// Ensure at least page 1 appears if no pages row exists
|
||||
if (!pages.length) pages.push({ page_num: 1, template: 'blank', name: null, stroke_count: stats.stroke_count });
|
||||
|
||||
res.json({
|
||||
session: { ...session, teacher_name: teacherName, class_name: className },
|
||||
stats,
|
||||
attendance,
|
||||
pages,
|
||||
});
|
||||
}
|
||||
|
||||
/* GET /api/classroom/:id/chat/export — plaintext chat transcript (teacher/admin) */
|
||||
function exportChat(req, res) {
|
||||
const sessionId = Number(req.params.id);
|
||||
const session = db.prepare('SELECT * FROM classroom_sessions WHERE id=?').get(sessionId);
|
||||
if (!session) return res.status(404).json({ error: 'Не найдено' });
|
||||
if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
|
||||
return res.status(403).json({ error: 'Нет доступа' });
|
||||
|
||||
const messages = db.prepare(`
|
||||
SELECT c.created_at, u.name AS user_name, c.message, c.attachment_url
|
||||
FROM classroom_chat c
|
||||
JOIN users u ON u.id = c.user_id
|
||||
WHERE c.session_id=? ORDER BY c.id ASC
|
||||
`).all(sessionId);
|
||||
|
||||
const title = session.title || `Урок #${sessionId}`;
|
||||
const date = session.created_at ? new Date(session.created_at).toLocaleDateString('ru-RU') : '';
|
||||
let text = `Чат урока: ${title}\nДата: ${date}\n${'─'.repeat(50)}\n\n`;
|
||||
|
||||
messages.forEach(m => {
|
||||
const ts = m.created_at ? new Date(m.created_at).toLocaleTimeString('ru-RU', { hour: '2-digit', minute: '2-digit' }) : '';
|
||||
text += `[${ts}] ${m.user_name}: ${m.message || ''}`;
|
||||
if (m.attachment_url) text += ` [вложение]`;
|
||||
text += '\n';
|
||||
});
|
||||
|
||||
const filename = `chat_${sessionId}_${date.replace(/\./g, '-')}.txt`;
|
||||
res.setHeader('Content-Type', 'text/plain; charset=utf-8');
|
||||
res.setHeader('Content-Disposition', `attachment; filename="${filename}"`);
|
||||
res.send(text);
|
||||
}
|
||||
|
||||
/* GET /api/classroom/:id/notes/all — all student notes (teacher/admin) */
|
||||
function getAllNotes(req, res) {
|
||||
const sessionId = Number(req.params.id);
|
||||
const session = db.prepare('SELECT * FROM classroom_sessions WHERE id=?').get(sessionId);
|
||||
if (!session) return res.status(404).json({ error: 'Не найдено' });
|
||||
if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
|
||||
return res.status(403).json({ error: 'Нет доступа' });
|
||||
|
||||
const notes = db.prepare(`
|
||||
SELECT n.content, n.updated_at, u.name AS user_name, u.id AS user_id
|
||||
FROM classroom_notes n
|
||||
JOIN users u ON u.id = n.user_id
|
||||
WHERE n.session_id=? AND n.content != '' ORDER BY u.name
|
||||
`).all(sessionId);
|
||||
|
||||
res.json({ notes });
|
||||
}
|
||||
|
||||
/* ── Lesson templates ───────────────────────────────────────────────────── */
|
||||
/* DELETE /api/classroom/:id/history — permanently delete an ended session record */
|
||||
function deleteHistorySession(req, res) {
|
||||
const sessionId = Number(req.params.id);
|
||||
const session = db.prepare('SELECT * FROM classroom_sessions WHERE id=?').get(sessionId);
|
||||
if (!session) return res.status(404).json({ error: 'Не найдено' });
|
||||
if (session.status !== 'ended') return res.status(400).json({ error: 'Можно удалять только завершённые сессии' });
|
||||
if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
|
||||
return res.status(403).json({ error: 'Нет доступа' });
|
||||
|
||||
db.prepare('DELETE FROM classroom_chat_reactions WHERE chat_id IN (SELECT id FROM classroom_chat WHERE session_id=?)').run(sessionId);
|
||||
db.prepare('DELETE FROM classroom_chat WHERE session_id=?').run(sessionId);
|
||||
db.prepare('DELETE FROM classroom_strokes WHERE session_id=?').run(sessionId);
|
||||
db.prepare('DELETE FROM classroom_pages WHERE session_id=?').run(sessionId);
|
||||
db.prepare('DELETE FROM classroom_attendance WHERE session_id=?').run(sessionId);
|
||||
db.prepare('DELETE FROM classroom_notes WHERE session_id=?').run(sessionId);
|
||||
db.prepare('DELETE FROM classroom_draw_permissions WHERE session_id=?').run(sessionId);
|
||||
db.prepare('DELETE FROM classroom_sessions WHERE id=?').run(sessionId);
|
||||
|
||||
res.json({ ok: true });
|
||||
}
|
||||
|
||||
/* GET /api/classroom/admin/active — all currently active sessions (admin only) */
|
||||
function adminGetActiveSessions(req, res) {
|
||||
if (req.user.role !== 'admin') return res.status(403).json({ error: 'Нет доступа' });
|
||||
|
||||
const sessions = db.prepare(`
|
||||
SELECT s.id, s.title, s.created_at, s.class_id, s.teacher_id,
|
||||
u.name AS teacher_name,
|
||||
c.name AS class_name,
|
||||
(SELECT COUNT(*) FROM classroom_attendance WHERE session_id=s.id AND left_at IS NULL) AS online_count,
|
||||
(SELECT COUNT(*) FROM classroom_attendance WHERE session_id=s.id) AS total_joined,
|
||||
(SELECT COUNT(*) FROM classroom_chat WHERE session_id=s.id) AS message_count
|
||||
FROM classroom_sessions s
|
||||
JOIN users u ON u.id = s.teacher_id
|
||||
LEFT JOIN classes c ON c.id = s.class_id
|
||||
WHERE s.status='active'
|
||||
ORDER BY s.created_at DESC
|
||||
`).all();
|
||||
|
||||
res.json({ sessions });
|
||||
}
|
||||
|
||||
/* GET /api/classroom/admin/sessions — all sessions paginated (admin only) */
|
||||
function adminGetAllSessions(req, res) {
|
||||
if (req.user.role !== 'admin') return res.status(403).json({ error: 'Нет доступа' });
|
||||
|
||||
const page = Math.max(1, Number(req.query.page) || 1);
|
||||
const limit = Math.min(50, Number(req.query.limit) || 20);
|
||||
const search = (req.query.search || '').trim();
|
||||
const teacherId = (req.query.teacher || '').trim();
|
||||
const classId = (req.query.class_id || '').trim();
|
||||
const dateFrom = (req.query.date_from || '').trim();
|
||||
const dateTo = (req.query.date_to || '').trim();
|
||||
const sort = req.query.sort || 'newest';
|
||||
const offset = (page - 1) * limit;
|
||||
|
||||
let where = "s.status='ended'";
|
||||
const params = [];
|
||||
if (search) { where += ` AND (s.title LIKE '%'||?||'%' OR u.name LIKE '%'||?||'%' OR c.name LIKE '%'||?||'%')`; params.push(search, search, search); }
|
||||
if (teacherId) { where += ` AND s.teacher_id=?`; params.push(Number(teacherId)); }
|
||||
if (classId) { where += ` AND s.class_id=?`; params.push(Number(classId)); }
|
||||
if (dateFrom) { where += ` AND date(s.created_at)>=?`; params.push(dateFrom); }
|
||||
if (dateTo) { where += ` AND date(s.created_at)<=?`; params.push(dateTo); }
|
||||
|
||||
const orderBy = sort === 'oldest' ? 's.ended_at ASC'
|
||||
: sort === 'longest' ? '(julianday(s.ended_at)-julianday(s.created_at)) DESC'
|
||||
: sort === 'most_students' ? 'participant_count DESC'
|
||||
: 's.ended_at DESC';
|
||||
|
||||
const total = db.prepare(`
|
||||
SELECT COUNT(*) AS n FROM classroom_sessions s
|
||||
JOIN users u ON u.id = s.teacher_id
|
||||
LEFT JOIN classes c ON c.id = s.class_id
|
||||
WHERE ${where}
|
||||
`).get(...params).n;
|
||||
|
||||
const sessions = db.prepare(`
|
||||
SELECT s.id, s.title, s.created_at, s.ended_at, s.class_id, s.teacher_id,
|
||||
u.name AS teacher_name,
|
||||
c.name AS class_name,
|
||||
(SELECT COUNT(*) FROM classroom_attendance WHERE session_id=s.id) AS participant_count,
|
||||
(SELECT COUNT(*) FROM classroom_chat WHERE session_id=s.id) AS message_count,
|
||||
COALESCE((SELECT MAX(page_num) FROM classroom_pages WHERE session_id=s.id),1) AS page_count,
|
||||
(SELECT COUNT(*) FROM classroom_strokes WHERE session_id=s.id) AS stroke_count
|
||||
FROM classroom_sessions s
|
||||
JOIN users u ON u.id = s.teacher_id
|
||||
LEFT JOIN classes c ON c.id = s.class_id
|
||||
WHERE ${where}
|
||||
ORDER BY ${orderBy}
|
||||
LIMIT ? OFFSET ?
|
||||
`).all(...params, limit, offset);
|
||||
|
||||
// Server-side aggregates (filtered)
|
||||
const agg = db.prepare(`
|
||||
SELECT COUNT(*) AS total_sessions,
|
||||
COUNT(DISTINCT s.teacher_id) AS total_teachers,
|
||||
COALESCE(SUM(CASE WHEN s.ended_at IS NOT NULL AND s.created_at IS NOT NULL
|
||||
THEN CAST((julianday(s.ended_at) - julianday(s.created_at)) * 86400 AS INTEGER)
|
||||
ELSE 0 END), 0) AS total_duration_sec
|
||||
FROM classroom_sessions s
|
||||
JOIN users u ON u.id = s.teacher_id
|
||||
LEFT JOIN classes c ON c.id = s.class_id
|
||||
WHERE ${where}
|
||||
`).get(...params);
|
||||
|
||||
const aggPart = db.prepare(`
|
||||
SELECT COALESCE(SUM(sub.pc),0) AS total_participants,
|
||||
COALESCE(SUM(sub.mc),0) AS total_messages
|
||||
FROM (
|
||||
SELECT s.id,
|
||||
(SELECT COUNT(*) FROM classroom_attendance WHERE session_id=s.id) AS pc,
|
||||
(SELECT COUNT(*) FROM classroom_chat WHERE session_id=s.id) AS mc
|
||||
FROM classroom_sessions s
|
||||
JOIN users u ON u.id = s.teacher_id
|
||||
LEFT JOIN classes c ON c.id = s.class_id
|
||||
WHERE ${where}
|
||||
) sub
|
||||
`).get(...params);
|
||||
|
||||
res.json({ sessions, total, page, pages: Math.ceil(total / limit),
|
||||
agg: { ...agg, ...aggPart } });
|
||||
}
|
||||
|
||||
/* GET /api/classroom/admin/teachers-list — teachers who have sessions (admin only) */
|
||||
function adminGetTeachersList(req, res) {
|
||||
if (req.user.role !== 'admin') return res.status(403).json({ error: 'Нет доступа' });
|
||||
const teachers = db.prepare(`
|
||||
SELECT DISTINCT u.id, u.name
|
||||
FROM classroom_sessions s
|
||||
JOIN users u ON u.id = s.teacher_id
|
||||
WHERE s.status='ended'
|
||||
ORDER BY u.name
|
||||
`).all();
|
||||
res.json({ teachers });
|
||||
}
|
||||
|
||||
function getTemplates(req, res) {
|
||||
const templates = db.prepare(
|
||||
'SELECT id, title, description, created_at FROM classroom_templates WHERE teacher_id=? ORDER BY created_at DESC'
|
||||
@@ -953,6 +1463,41 @@ function loadTemplate(req, res) {
|
||||
res.json({ ok: true, pages: pagesData.length });
|
||||
}
|
||||
|
||||
/* ── Guest token: generate / revoke ───────────────────────────────────── */
|
||||
function generateGuestToken(req, res) {
|
||||
const sessionId = Number(req.params.id);
|
||||
const session = db.prepare('SELECT id, teacher_id FROM classroom_sessions WHERE id=?').get(sessionId);
|
||||
if (!session) return res.status(404).json({ error: 'Not found' });
|
||||
if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
|
||||
return res.status(403).json({ error: 'Forbidden' });
|
||||
|
||||
const token = crypto.randomBytes(24).toString('base64url');
|
||||
db.prepare('UPDATE classroom_sessions SET guest_token=? WHERE id=?').run(token, sessionId);
|
||||
res.json({ token, url: `/guest-board.html?token=${token}` });
|
||||
}
|
||||
|
||||
function revokeGuestToken(req, res) {
|
||||
const sessionId = Number(req.params.id);
|
||||
const session = db.prepare('SELECT id, teacher_id FROM classroom_sessions WHERE id=?').get(sessionId);
|
||||
if (!session) return res.status(404).json({ error: 'Not found' });
|
||||
if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
|
||||
return res.status(403).json({ error: 'Forbidden' });
|
||||
|
||||
db.prepare('UPDATE classroom_sessions SET guest_token=NULL WHERE id=?').run(sessionId);
|
||||
res.json({ ok: true });
|
||||
}
|
||||
|
||||
function getGuestToken(req, res) {
|
||||
const sessionId = Number(req.params.id);
|
||||
const session = db.prepare('SELECT id, teacher_id, guest_token FROM classroom_sessions WHERE id=?').get(sessionId);
|
||||
if (!session) return res.status(404).json({ error: 'Not found' });
|
||||
if (session.teacher_id !== req.user.id && req.user.role !== 'admin')
|
||||
return res.status(403).json({ error: 'Forbidden' });
|
||||
|
||||
if (!session.guest_token) return res.json({ token: null, url: null });
|
||||
res.json({ token: session.guest_token, url: `/guest-board.html?token=${session.guest_token}` });
|
||||
}
|
||||
|
||||
module.exports = {
|
||||
createSession,
|
||||
getSession,
|
||||
@@ -975,12 +1520,20 @@ module.exports = {
|
||||
addPage,
|
||||
changePage,
|
||||
updatePageTemplate,
|
||||
getPages,
|
||||
renamePage,
|
||||
duplicatePage,
|
||||
deletePage,
|
||||
raiseHand,
|
||||
lowerHand,
|
||||
getHands,
|
||||
mutePeer,
|
||||
screenStart,
|
||||
screenStop,
|
||||
simOpen,
|
||||
simClose,
|
||||
simState,
|
||||
simMode,
|
||||
clearPage,
|
||||
previewStroke,
|
||||
broadcastCursor,
|
||||
@@ -995,4 +1548,16 @@ module.exports = {
|
||||
saveTemplate,
|
||||
deleteTemplate,
|
||||
loadTemplate,
|
||||
getClassHistory,
|
||||
getMyHistory,
|
||||
getSessionSummary,
|
||||
exportChat,
|
||||
getAllNotes,
|
||||
deleteHistorySession,
|
||||
adminGetActiveSessions,
|
||||
adminGetAllSessions,
|
||||
adminGetTeachersList,
|
||||
generateGuestToken,
|
||||
revokeGuestToken,
|
||||
getGuestToken,
|
||||
};
|
||||
|
||||
@@ -862,7 +862,8 @@ db.exec(`
|
||||
('feature_knowledge_map_enabled', '1'),
|
||||
('feature_board_enabled', '1'),
|
||||
('feature_biochem_enabled', '1'),
|
||||
('feature_live_quiz_enabled', '1');
|
||||
('feature_live_quiz_enabled', '1'),
|
||||
('feature_classroom_enabled', '1');
|
||||
`);
|
||||
|
||||
/* ── Performance indexes ───────────────────────────────────────────────── */
|
||||
@@ -2773,8 +2774,9 @@ db.exec(`
|
||||
UNIQUE(session_id, page_num)
|
||||
)
|
||||
`);
|
||||
// Add template column to existing classroom_pages tables (idempotent)
|
||||
// Add template + name columns to existing classroom_pages tables (idempotent)
|
||||
try { db.exec(`ALTER TABLE classroom_pages ADD COLUMN template TEXT NOT NULL DEFAULT 'blank'`); } catch (_) { /* already exists */ }
|
||||
try { db.exec(`ALTER TABLE classroom_pages ADD COLUMN name TEXT`); } catch (_) { /* already exists */ }
|
||||
|
||||
db.exec(`
|
||||
CREATE TABLE IF NOT EXISTS classroom_strokes (
|
||||
@@ -2854,6 +2856,9 @@ db.exec(`
|
||||
)
|
||||
`);
|
||||
|
||||
// Guest token for classroom sessions (public read-only whiteboard access)
|
||||
try { db.exec("ALTER TABLE classroom_sessions ADD COLUMN guest_token TEXT UNIQUE"); } catch {}
|
||||
|
||||
// Persistent draw permissions (survives server restart)
|
||||
db.exec(`
|
||||
CREATE TABLE IF NOT EXISTS classroom_draw_permissions (
|
||||
|
||||
@@ -30,9 +30,16 @@ const auth = [authMiddleware];
|
||||
const chatLimiter = rateLimit({ windowMs: 5_000, max: 5, message: 'Слишком много сообщений, подождите' });
|
||||
|
||||
// Template library — MUST be before /:id to avoid shadowing
|
||||
router.get('/admin/active', ...teacher, c.adminGetActiveSessions);
|
||||
router.get('/admin/sessions', ...teacher, c.adminGetAllSessions);
|
||||
router.get('/admin/teachers-list', ...teacher, c.adminGetTeachersList);
|
||||
router.get('/templates', ...teacher, c.getTemplates);
|
||||
router.delete('/templates/:tid', ...teacher, c.deleteTemplate);
|
||||
|
||||
// History — MUST be before /:id to avoid shadowing
|
||||
router.get('/my/history', ...auth, c.getMyHistory);
|
||||
router.get('/class/:classId/history', ...auth, c.getClassHistory);
|
||||
|
||||
// Session lifecycle
|
||||
router.post('/', ...teacher, c.createSession);
|
||||
router.get('/online-students', ...teacher, c.getOnlineStudents);
|
||||
@@ -65,9 +72,13 @@ router.patch('/:id/strokes/:strokeId', ...auth, c.updateStroke);
|
||||
router.post('/:id/stroke-preview', ...auth, c.previewStroke);
|
||||
|
||||
// Multi-page
|
||||
router.post('/:id/pages', ...teacher, c.addPage);
|
||||
router.put('/:id/page', ...teacher, c.changePage);
|
||||
router.patch('/:id/page-template', ...teacher, c.updatePageTemplate);
|
||||
router.get('/:id/pages', ...auth, c.getPages);
|
||||
router.post('/:id/pages', ...teacher, c.addPage);
|
||||
router.put('/:id/page', ...teacher, c.changePage);
|
||||
router.patch('/:id/page-template', ...teacher, c.updatePageTemplate);
|
||||
router.patch('/:id/pages/:pageNum/name', ...teacher, c.renamePage);
|
||||
router.post('/:id/pages/:pageNum/duplicate', ...teacher, c.duplicatePage);
|
||||
router.delete('/:id/pages/:pageNum', ...teacher, c.deletePage);
|
||||
|
||||
// Hand raise
|
||||
router.post('/:id/hand', ...auth, c.raiseHand);
|
||||
@@ -82,6 +93,12 @@ router.post('/:id/mute', ...teacher, c.mutePeer);
|
||||
router.post('/:id/screen', ...teacher, c.screenStart);
|
||||
router.delete('/:id/screen', ...teacher, c.screenStop);
|
||||
|
||||
// Simulation: open/close/state/mode for all participants
|
||||
router.post('/:id/sim', ...teacher, c.simOpen);
|
||||
router.delete('/:id/sim', ...teacher, c.simClose);
|
||||
router.post('/:id/sim/state', ...teacher, c.simState);
|
||||
router.post('/:id/sim/mode', ...teacher, c.simMode);
|
||||
|
||||
// Cursor broadcast (all participants)
|
||||
router.post('/:id/cursor', ...auth, c.broadcastCursor);
|
||||
|
||||
@@ -95,10 +112,21 @@ router.delete('/:id/allow-draw/:userId', ...teacher, c.revokeDraw);
|
||||
// Session notes (per user)
|
||||
router.get('/:id/notes', ...auth, c.getNotes);
|
||||
router.put('/:id/notes', ...auth, c.saveNotes);
|
||||
router.get('/:id/notes/all', ...teacher, c.getAllNotes);
|
||||
|
||||
// Session summary & history detail
|
||||
router.get('/:id/summary', ...auth, c.getSessionSummary);
|
||||
router.get('/:id/chat/export', ...teacher, c.exportChat);
|
||||
router.delete('/:id/history', ...teacher, c.deleteHistorySession);
|
||||
|
||||
// Save current session as template
|
||||
router.post('/:id/save-template', ...teacher, c.saveTemplate);
|
||||
// Load template into current session
|
||||
router.post('/:id/load-template', ...teacher, c.loadTemplate);
|
||||
|
||||
// Guest token (generate/revoke/get)
|
||||
router.get('/:id/guest-token', ...teacher, c.getGuestToken);
|
||||
router.post('/:id/guest-token', ...teacher, c.generateGuestToken);
|
||||
router.delete('/:id/guest-token', ...teacher, c.revokeGuestToken);
|
||||
|
||||
module.exports = router;
|
||||
|
||||
@@ -0,0 +1,168 @@
|
||||
/**
|
||||
* Public (no-auth) guest classroom routes.
|
||||
* Guests access the whiteboard read-only via a token in the URL.
|
||||
*
|
||||
* GET /api/classroom/guest/:token — session info (pre-join)
|
||||
* POST /api/classroom/guest/:token/join — choose display name, get guestId
|
||||
* GET /api/classroom/guest/:token/strokes — strokes for ?page_num=N
|
||||
* GET /api/classroom/guest/:token/stream — SSE stream (?guestId=X)
|
||||
* POST /api/classroom/guest/:token/leave — notify departure (optional)
|
||||
*/
|
||||
|
||||
const router = require('express').Router();
|
||||
const crypto = require('crypto');
|
||||
const db = require('../db/db');
|
||||
const { addGuestClient, removeGuestClient, emitToGuests, emit } = require('../sse');
|
||||
|
||||
/* ── In-memory guest registry (cleared on server restart — fine for guests) */
|
||||
const guests = new Map(); // guestId → { name, sessionId, connectedAt }
|
||||
|
||||
/* Helper: look up session by token (active only) */
|
||||
function sessionByToken(token) {
|
||||
return db.prepare(
|
||||
"SELECT id, title, status, current_page, teacher_id FROM classroom_sessions WHERE guest_token=?"
|
||||
).get(token);
|
||||
}
|
||||
|
||||
/* Helper: emit guest-joined/left to the real participants of the session */
|
||||
function notifySession(sessionId, data) {
|
||||
const session = db.prepare('SELECT class_id, teacher_id FROM classroom_sessions WHERE id=?').get(sessionId);
|
||||
if (!session) return;
|
||||
const { emit: _emit, emitToClass } = require('../sse');
|
||||
if (session.class_id) {
|
||||
emitToClass(session.class_id, data);
|
||||
_emit(session.teacher_id, data);
|
||||
} else {
|
||||
_emit(session.teacher_id, data);
|
||||
const invites = db.prepare('SELECT user_id FROM classroom_invites WHERE session_id=?').all(sessionId);
|
||||
for (const { user_id } of invites) _emit(user_id, data);
|
||||
}
|
||||
}
|
||||
|
||||
/* ── GET /api/classroom/guest/:token ─── session info (pre-join screen) */
|
||||
router.get('/:token', (req, res) => {
|
||||
const session = sessionByToken(req.params.token);
|
||||
if (!session) return res.status(404).json({ error: 'Ссылка недействительна' });
|
||||
|
||||
const pageCount = db.prepare(
|
||||
'SELECT COUNT(*) AS c FROM classroom_pages WHERE session_id=?'
|
||||
).get(session.id).c || 1;
|
||||
|
||||
res.json({
|
||||
id: session.id,
|
||||
title: session.title || 'Онлайн-урок',
|
||||
status: session.status,
|
||||
current_page: session.current_page || 1,
|
||||
page_count: pageCount,
|
||||
});
|
||||
});
|
||||
|
||||
/* ── POST /api/classroom/guest/:token/join ─── choose name, get guestId */
|
||||
router.post('/:token/join', (req, res) => {
|
||||
const session = sessionByToken(req.params.token);
|
||||
if (!session) return res.status(404).json({ error: 'Ссылка недействительна' });
|
||||
if (session.status !== 'active')
|
||||
return res.status(403).json({ error: 'Урок ещё не начался или уже завершён' });
|
||||
|
||||
const rawName = (req.body?.name || '').trim().slice(0, 40);
|
||||
const name = rawName || 'Гость';
|
||||
|
||||
const guestId = 'g_' + crypto.randomBytes(12).toString('base64url');
|
||||
guests.set(guestId, { name, sessionId: session.id, connectedAt: Date.now() });
|
||||
|
||||
// Notify real participants that a guest joined
|
||||
notifySession(session.id, {
|
||||
type: 'classroom_guest_joined',
|
||||
sessionId: session.id,
|
||||
guestId,
|
||||
guestName: name,
|
||||
});
|
||||
|
||||
const pageCount = db.prepare(
|
||||
'SELECT COUNT(*) AS c FROM classroom_pages WHERE session_id=?'
|
||||
).get(session.id).c || 1;
|
||||
|
||||
res.json({
|
||||
guestId,
|
||||
sessionId: session.id,
|
||||
title: session.title || 'Онлайн-урок',
|
||||
current_page: session.current_page || 1,
|
||||
page_count: pageCount,
|
||||
});
|
||||
});
|
||||
|
||||
/* ── GET /api/classroom/guest/:token/strokes ─── whiteboard strokes */
|
||||
router.get('/:token/strokes', (req, res) => {
|
||||
const session = sessionByToken(req.params.token);
|
||||
if (!session) return res.status(404).json({ error: 'Ссылка недействительна' });
|
||||
if (session.status !== 'active')
|
||||
return res.status(403).json({ error: 'Урок не активен' });
|
||||
|
||||
const pageNum = Math.max(1, Number(req.query.page_num) || 1);
|
||||
const sinceSeq = Number(req.query.since_seq) || 0;
|
||||
|
||||
const strokes = sinceSeq > 0
|
||||
? db.prepare(
|
||||
'SELECT id, tool, data, seq FROM classroom_strokes WHERE session_id=? AND page_num=? AND seq > ? ORDER BY seq'
|
||||
).all(session.id, pageNum, sinceSeq)
|
||||
: db.prepare(
|
||||
'SELECT id, tool, data, seq FROM classroom_strokes WHERE session_id=? AND page_num=? ORDER BY seq'
|
||||
).all(session.id, pageNum);
|
||||
|
||||
const pageRow = db.prepare(
|
||||
'SELECT template, name FROM classroom_pages WHERE session_id=? AND page_num=?'
|
||||
).get(session.id, pageNum);
|
||||
|
||||
const parsed = strokes.map(s => ({ ...s, data: JSON.parse(s.data || '{}') }));
|
||||
res.json({ strokes: parsed, template: pageRow?.template || 'blank', seq: parsed.at(-1)?.seq || 0 });
|
||||
});
|
||||
|
||||
/* ── GET /api/classroom/guest/:token/stream ─── SSE */
|
||||
router.get('/:token/stream', (req, res) => {
|
||||
const session = sessionByToken(req.params.token);
|
||||
if (!session) return res.status(404).end();
|
||||
if (session.status !== 'active') return res.status(403).end();
|
||||
|
||||
const guestId = req.query.guestId;
|
||||
const guest = guestId ? guests.get(guestId) : null;
|
||||
|
||||
res.setHeader('Content-Type', 'text/event-stream');
|
||||
res.setHeader('Cache-Control', 'no-cache');
|
||||
res.setHeader('Connection', 'keep-alive');
|
||||
res.setHeader('X-Accel-Buffering', 'no'); // nginx: disable buffering
|
||||
res.flushHeaders();
|
||||
res.write(`data: ${JSON.stringify({ type: 'connected' })}\n\n`);
|
||||
|
||||
addGuestClient(session.id, res);
|
||||
|
||||
req.on('close', () => {
|
||||
removeGuestClient(session.id, res);
|
||||
if (guest) {
|
||||
guests.delete(guestId);
|
||||
notifySession(session.id, {
|
||||
type: 'classroom_guest_left',
|
||||
sessionId: session.id,
|
||||
guestId,
|
||||
guestName: guest.name,
|
||||
});
|
||||
}
|
||||
});
|
||||
});
|
||||
|
||||
/* ── POST /api/classroom/guest/:token/leave ─── explicit goodbye */
|
||||
router.post('/:token/leave', (req, res) => {
|
||||
const guestId = req.body?.guestId;
|
||||
const guest = guestId ? guests.get(guestId) : null;
|
||||
if (guest) {
|
||||
guests.delete(guestId);
|
||||
notifySession(guest.sessionId, {
|
||||
type: 'classroom_guest_left',
|
||||
sessionId: guest.sessionId,
|
||||
guestId,
|
||||
guestName: guest.name,
|
||||
});
|
||||
}
|
||||
res.json({ ok: true });
|
||||
});
|
||||
|
||||
module.exports = router;
|
||||
+11
-6
@@ -32,8 +32,9 @@ const flashcardRoutes = require('./routes/flashcards');
|
||||
const settingsRoutes = require('./routes/settings');
|
||||
const analyticsRoutes = require('./routes/analytics');
|
||||
const liveRoutes = require('./routes/live');
|
||||
const classroomRoutes = require('./routes/classroom');
|
||||
const gamesRoutes = require('./routes/games');
|
||||
const classroomRoutes = require('./routes/classroom');
|
||||
const guestClassroomRoutes = require('./routes/guestClassroom');
|
||||
const gamesRoutes = require('./routes/games');
|
||||
const knowledgeMapRoutes = require('./routes/knowledgeMap');
|
||||
const petRoutes = require('./routes/pet');
|
||||
const collectionRoutes = require('./routes/collection');
|
||||
@@ -77,8 +78,8 @@ app.use((_req, res, next) => {
|
||||
"font-src 'self' https://fonts.gstatic.com https://cdn.jsdelivr.net; " +
|
||||
"img-src 'self' data: blob: https:; " +
|
||||
"connect-src 'self' https://cdn.jsdelivr.net https://stun.l.google.com; " +
|
||||
"frame-src https://www.youtube.com https://rutube.ru https://player.vimeo.com; " +
|
||||
"frame-ancestors 'none'" +
|
||||
"frame-src 'self' https://www.youtube.com https://rutube.ru https://player.vimeo.com; " +
|
||||
"frame-ancestors 'self'" +
|
||||
(isProd ? "; upgrade-insecure-requests" : "")
|
||||
);
|
||||
if (isProd) res.setHeader('Strict-Transport-Security', 'max-age=31536000; includeSubDomains');
|
||||
@@ -143,8 +144,9 @@ app.use('/api/search', searchRoutes);
|
||||
app.use('/api/flashcards', flashcardRoutes);
|
||||
app.use('/api/settings', settingsRoutes);
|
||||
app.use('/api/analytics', analyticsRoutes);
|
||||
app.use('/api/live', liveRoutes);
|
||||
app.use('/api/classroom', classroomRoutes);
|
||||
app.use('/api/live', liveRoutes);
|
||||
app.use('/api/classroom/guest', guestClassroomRoutes); // public — MUST be before /api/classroom
|
||||
app.use('/api/classroom', classroomRoutes);
|
||||
app.use('/api/games', gamesRoutes);
|
||||
app.use('/api/knowledge-map', knowledgeMapRoutes);
|
||||
app.use('/api/pet', petRoutes);
|
||||
@@ -308,6 +310,9 @@ app.use((_req, res) => res.status(404).sendFile(path.join(frontendDir, '404.html
|
||||
|
||||
const server = app.listen(PORT, () => logger.info(`Server running on port ${PORT}`, { env: config.NODE_ENV }));
|
||||
|
||||
/* ── WebSocket server for low-latency classroom events (cursor + preview) ── */
|
||||
require('./ws-server').attach(server);
|
||||
|
||||
/* ── Graceful shutdown ── */
|
||||
function shutdown(signal) {
|
||||
logger.info(`${signal} received — shutting down gracefully`);
|
||||
|
||||
+37
-2
@@ -1,5 +1,6 @@
|
||||
/* ── SSE registry — shared between controllers ─────────────────────────── */
|
||||
const clients = new Map(); // userId -> Set<res>
|
||||
const clients = new Map(); // userId -> Set<res>
|
||||
const guestClients = new Map(); // sessionId -> Set<res>
|
||||
const db = require('./db/db');
|
||||
|
||||
function addClient(userId, res) {
|
||||
@@ -34,6 +35,15 @@ setInterval(() => {
|
||||
}
|
||||
if (conns.size === 0) clients.delete(userId);
|
||||
}
|
||||
for (const [sessionId, conns] of guestClients) {
|
||||
for (const res of conns) {
|
||||
try {
|
||||
if (res.writableEnded || res.destroyed) { conns.delete(res); continue; }
|
||||
res.write(': heartbeat\n\n');
|
||||
} catch { conns.delete(res); }
|
||||
}
|
||||
if (conns.size === 0) guestClients.delete(sessionId);
|
||||
}
|
||||
}, 30_000).unref();
|
||||
|
||||
/* Broadcast to all members of a class */
|
||||
@@ -42,9 +52,34 @@ function emitToClass(classId, data) {
|
||||
for (const { user_id } of members) emit(user_id, data);
|
||||
}
|
||||
|
||||
/* ── Guest SSE (session-scoped, no userId) ── */
|
||||
function addGuestClient(sessionId, res) {
|
||||
if (!guestClients.has(sessionId)) guestClients.set(sessionId, new Set());
|
||||
guestClients.get(sessionId).add(res);
|
||||
}
|
||||
|
||||
function removeGuestClient(sessionId, res) {
|
||||
const set = guestClients.get(sessionId);
|
||||
if (!set) return;
|
||||
set.delete(res);
|
||||
if (set.size === 0) guestClients.delete(sessionId);
|
||||
}
|
||||
|
||||
function emitToGuests(sessionId, data) {
|
||||
const set = guestClients.get(sessionId);
|
||||
if (!set?.size) return;
|
||||
const payload = `data: ${JSON.stringify(data)}\n\n`;
|
||||
for (const res of set) {
|
||||
try { res.write(payload); } catch {}
|
||||
}
|
||||
}
|
||||
|
||||
/* Returns array of user IDs currently connected via SSE */
|
||||
function getOnlineUserIds() {
|
||||
return [...clients.keys()];
|
||||
}
|
||||
|
||||
module.exports = { addClient, removeClient, emit, emitToClass, getOnlineUserIds };
|
||||
module.exports = {
|
||||
addClient, removeClient, emit, emitToClass, getOnlineUserIds,
|
||||
addGuestClient, removeGuestClient, emitToGuests,
|
||||
};
|
||||
|
||||
@@ -0,0 +1,159 @@
|
||||
/**
|
||||
* WebSocket server for low-latency real-time classroom events.
|
||||
*
|
||||
* Handles two message types from clients:
|
||||
* { type:'cursor', sessionId, x, y, pageNum }
|
||||
* { type:'preview', sessionId, liveId, tool, data, pageNum, cancel }
|
||||
*
|
||||
* Auth: JWT token in ?token= query param on upgrade request.
|
||||
* Forwards events via SSE to session participants (no DB write).
|
||||
*
|
||||
* This replaces the HTTP POST /cursor and /stroke-preview endpoints
|
||||
* for connected clients, reducing per-event latency from ~50-120ms to ~2-5ms.
|
||||
*/
|
||||
const { WebSocketServer } = require('ws');
|
||||
const jwt = require('jsonwebtoken');
|
||||
const db = require('./db/db');
|
||||
const { emit, emitToGuests } = require('./sse');
|
||||
|
||||
/* ── Session member cache (avoids DB query per WS message) ────────────── */
|
||||
const _cache = new Map(); // sessionId → { teacherId, classId, userIds, ts }
|
||||
const CACHE_TTL = 30_000;
|
||||
|
||||
function _getMembers(sessionId) {
|
||||
const c = _cache.get(sessionId);
|
||||
if (c && Date.now() - c.ts < CACHE_TTL) return c;
|
||||
|
||||
const session = db.prepare(
|
||||
"SELECT class_id, teacher_id FROM classroom_sessions WHERE id=? AND status='active'"
|
||||
).get(sessionId);
|
||||
if (!session) { _cache.delete(sessionId); return null; }
|
||||
|
||||
let userIds;
|
||||
if (session.class_id) {
|
||||
const members = db.prepare('SELECT user_id FROM class_members WHERE class_id=?').all(session.class_id);
|
||||
userIds = [session.teacher_id, ...members.map(m => m.user_id)];
|
||||
} else {
|
||||
const invites = db.prepare('SELECT user_id FROM classroom_invites WHERE session_id=?').all(sessionId);
|
||||
userIds = [session.teacher_id, ...invites.map(i => i.user_id)];
|
||||
}
|
||||
|
||||
const entry = { teacherId: session.teacher_id, classId: session.class_id, userIds, ts: Date.now() };
|
||||
_cache.set(sessionId, entry);
|
||||
return entry;
|
||||
}
|
||||
|
||||
function _invalidateSession(sessionId) {
|
||||
_cache.delete(sessionId);
|
||||
}
|
||||
|
||||
/* Forward serialized SSE payload to all session members */
|
||||
function _broadcast(sessionId, data, includeGuests) {
|
||||
const members = _getMembers(sessionId);
|
||||
if (!members) return;
|
||||
for (const uid of members.userIds) emit(uid, data);
|
||||
if (includeGuests) emitToGuests(sessionId, data);
|
||||
}
|
||||
|
||||
/* Check draw permissions (teacher always can; students need explicit grant) */
|
||||
const _drawCache = new Map(); // `${sessionId}:${userId}` → { allowed, ts }
|
||||
const DRAW_TTL = 10_000;
|
||||
|
||||
function _canDraw(sessionId, userId, members) {
|
||||
if (!members) return false;
|
||||
if (members.teacherId === userId) return true;
|
||||
const key = `${sessionId}:${userId}`;
|
||||
const c = _drawCache.get(key);
|
||||
if (c && Date.now() - c.ts < DRAW_TTL) return c.allowed;
|
||||
const allowed = !!db.prepare(
|
||||
'SELECT 1 FROM classroom_draw_permissions WHERE session_id=? AND user_id=?'
|
||||
).get(sessionId, userId);
|
||||
_drawCache.set(key, { allowed, ts: Date.now() });
|
||||
return allowed;
|
||||
}
|
||||
|
||||
/* ── WebSocket server ──────────────────────────────────────────────────── */
|
||||
function attach(httpServer) {
|
||||
const wss = new WebSocketServer({ server: httpServer, path: '/ws' });
|
||||
|
||||
wss.on('connection', (ws, req) => {
|
||||
/* ── Auth ── */
|
||||
let user = null;
|
||||
try {
|
||||
const url = new URL(req.url, 'http://localhost');
|
||||
const token = url.searchParams.get('token') || '';
|
||||
user = jwt.verify(token, process.env.JWT_SECRET, { algorithms: ['HS256'] });
|
||||
} catch {
|
||||
ws.close(4001, 'Unauthorized');
|
||||
return;
|
||||
}
|
||||
|
||||
ws.userId = user.id;
|
||||
ws.userName = user.name || user.email || '';
|
||||
ws.isAlive = true;
|
||||
|
||||
ws.on('pong', () => { ws.isAlive = true; });
|
||||
|
||||
ws.on('message', raw => {
|
||||
let msg;
|
||||
try { msg = JSON.parse(raw); } catch { return; }
|
||||
|
||||
const { type, sessionId } = msg;
|
||||
if (!sessionId || typeof sessionId !== 'number') return;
|
||||
|
||||
/* ── cursor broadcast ── */
|
||||
if (type === 'cursor') {
|
||||
const members = _getMembers(sessionId);
|
||||
if (!members || !members.userIds.includes(ws.userId)) return;
|
||||
|
||||
_broadcast(sessionId, {
|
||||
type: 'classroom_cursor',
|
||||
sessionId,
|
||||
x: msg.x,
|
||||
y: msg.y,
|
||||
pageNum: msg.pageNum || 1,
|
||||
userId: ws.userId,
|
||||
userName: ws.userName,
|
||||
}, true);
|
||||
|
||||
/* ── stroke preview broadcast ── */
|
||||
} else if (type === 'preview') {
|
||||
const members = _getMembers(sessionId);
|
||||
if (!members) return;
|
||||
if (!_canDraw(sessionId, ws.userId, members)) return;
|
||||
|
||||
const liveId = msg.liveId;
|
||||
if (!liveId && !msg.cancel) return;
|
||||
|
||||
_broadcast(sessionId, {
|
||||
type: 'classroom_stroke_preview',
|
||||
sessionId,
|
||||
pageNum: msg.pageNum || 1,
|
||||
liveId,
|
||||
tool: msg.tool,
|
||||
data: msg.data,
|
||||
cancel: msg.cancel || false,
|
||||
userId: ws.userId,
|
||||
userName: ws.userName,
|
||||
}, true);
|
||||
}
|
||||
});
|
||||
|
||||
ws.on('error', () => {});
|
||||
ws.on('close', () => {});
|
||||
});
|
||||
|
||||
/* ── Ping/pong keepalive ── */
|
||||
const pingTimer = setInterval(() => {
|
||||
for (const ws of wss.clients) {
|
||||
if (!ws.isAlive) { ws.terminate(); continue; }
|
||||
ws.isAlive = false;
|
||||
try { ws.ping(); } catch {}
|
||||
}
|
||||
}, 30_000);
|
||||
wss.on('close', () => clearInterval(pingTimer));
|
||||
|
||||
return wss;
|
||||
}
|
||||
|
||||
module.exports = { attach, invalidateSession: _invalidateSession };
|
||||
Reference in New Issue
Block a user